For what it's worth, they are going to become more frequent and much worse as time goes on. The cause can be traced back further than most desire to venture. I'd rather not start a fire by expressing my views on the matter ;)

Hmm a metorite could cause it. Never thought of that one. One could hit in the middle of the ocean and who would know?
I've heard arguments on both sides about global warming. I'm not sure who is right.
I don't know anything about the Solomon Islands, guess a trip to Google is in order.

A 7.2-magnitude earthquake triggered landslides and a tsunami that struck the Solomon Islands on Monday, leaving more than 1,000 people homeless but none dead or injured, according to initial reports.

Officials say the tsunami wave triggered by the quake was around ten feet high when it plowed into the coast but that residents had acted quickly with memories of earlier disasters still fresh in their minds.

Three months earlier, a quake-churned tsunami killed more than 200 on nearby Samoa and Tonga. And in April 2007, a tsunami had killed more than 50 people in the thousand-island country.

The Solomon Islands, which lie east of Papua New Guinea, rest on the "Ring of Fire" - an arc of earthquake and volcanic zones that stretches around the Pacific Rim and where about 90 percent of the world's quakes occur.

Monday’s quake was Solomon Islands' first and the largest this week, with at least nine other quakes greater than magnitude 5.0 having rocked the earthquake-prone region, including three Tuesday night.

The island that was hit on Monday, Rendova, is home to only 3,600 – more than 1,000 of which have been affected after some 200 houses were destroyed by the quake.

At least it's not as bad as Aceh in the Boxing Day tsunami a few years back.

Wikipedia tells us that:

Earthquakes, volcanic eruptions and other underwater explosions (detonations of nuclear devices at sea), landslides and other mass movements, bolide impacts, and other disturbances above or below water all have the potential to generate a tsunami.

Ocean levels have been rising for a while, as predicted, and scientists expect the trend to continue. Not sure how much difference it makes but you'd imagine it would tend to make the effect of tsunamis worse. As we clear more land near the sea you'd also expect more landslides.

I have a friend who was going to Solomon Islands to start a new job on Sunday and ended up getting her booking changed by her work for next week. Lucky!! Loooks like the job isn't happening any more. Full on stuff.